Since today, forums' "Search" and "Posts Since Last Visit" will display their results grouped by categories in the following order:

Private

General

Community

Playlist

If you want to disable that and see the results in the previous order (chronological), you have edit your profile (Your Profile, Edit Your Info) and mark 'No' for the option "Group Forum Searches"._________________Resistance is futile. You will be assimilated.
(Borg Collective, 1989)